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    <title>Document</title>
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    <!-- meter -->
    <!-- HTML <meter>元素用来显示已知范围的标量值或者分数值。  -->
    <div>
        <p>Display a meter:</p>
        <meter min="5" max="95" low="20" high="80" value="60"></meter>
    </div>

    <!-- progress -->
    <!-- HTML中的<progress>元素用来显示一项任务的完成进度 -->
    <div>
        <p>Progress of a task:</p>
        <progress max="100" value="78"></progress>
    </div>

</body>

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